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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "fields/struct_field.h"
#include "util.h"
const std::string StructField::kFieldType = "StructField";
StructField::StructField(std::string name, std::string type_name, Size size, ParseLocation loc)
: PacketField(name, loc), type_name_(type_name), size_(size) {}
const std::string& StructField::GetFieldType() const {
return StructField::kFieldType;
}
Size StructField::GetSize() const {
return size_;
}
Size StructField::GetBuilderSize() const {
std::string ret = "(" + GetName() + "_.size() * 8)";
return ret;
}
std::string StructField::GetDataType() const {
return type_name_;
}
void StructField::GenExtractor(std::ostream& s, int, bool) const {
s << GetName() << "_it = ";
s << GetDataType() << "::Parse(" << GetName() << "_ptr, " << GetName() << "_it);";
}
std::string StructField::GetGetterFunctionName() const {
std::stringstream ss;
ss << "Get" << util::UnderscoreToCamelCase(GetName());
return ss.str();
}
void StructField::GenGetter(std::ostream& s, Size start_offset, Size end_offset) const {
s << GetDataType() << " " << GetGetterFunctionName() << "() const {";
s << "ASSERT(was_validated_);";
s << "size_t end_index = size();";
s << "auto to_bound = begin();";
int num_leading_bits = GenBounds(s, start_offset, end_offset, GetSize());
s << GetDataType() << " " << GetName() << "_value{};";
s << GetDataType() << "* " << GetName() << "_ptr = &" << GetName() << "_value;";
GenExtractor(s, num_leading_bits, false);
s << "return " << GetName() << "_value;";
s << "}\n";
}
std::string StructField::GetBuilderParameterType() const {
return GetDataType();
}
bool StructField::HasParameterValidator() const {
return false;
}
void StructField::GenParameterValidator(std::ostream&) const {
// Validated at compile time.
}
void StructField::GenInserter(std::ostream& s) const {
s << GetName() << "_.Serialize(i);";
}
void StructField::GenValidator(std::ostream&) const {
// Do nothing
}
void StructField::GenStringRepresentation(std::ostream& s, std::string accessor) const {
s << accessor << ".ToString()";
}
std::string StructField::GetRustDataType() const {
return GetDataType();
}
void StructField::GenBoundsCheck(std::ostream&, Size, Size, std::string) const {
// implicitly checked by the struct parser
}
void StructField::GenRustGetter(std::ostream& s, Size start_offset, Size) const {
s << "let " << GetName() << " = ";
s << GetRustDataType() << "::parse(&bytes[" << start_offset.bytes() << "..";
s << start_offset.bytes() + GetSize().bytes() << "]).unwrap();";
}
void StructField::GenRustWriter(std::ostream& s, Size start_offset, Size) const {
s << "let " << GetName() << " = &mut buffer[" << start_offset.bytes();
s << ".." << start_offset.bytes() + GetSize().bytes() << "];";
s << "self." << GetName() << ".write_to(" << GetName() << ");";
}
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